Vacuum-tube apparatus.



. V No. 895,486 y f- `/f 'I A- D. MGP. MOORE. A v *l v I Y f VACUUM TUBE APPARATUS.

' 7 'APPLIoATzoN ump APB. 190s.

PATENTED AUG. 11, 190s.

" srnfris ienfrnivr OFFICE.

DANIEL MCFAR'LAN MOORE, OF NEWARK, NEW JERSEY, ASSIGNOR TO MOORE ELECTRICAL' COMPANY, OF NEW YORK, N. Y., A CORPORATION OF N EWYQRK.

y, VACUUM-TUBE APPARATUS.

Piate-ated Aug. 1 1, 1908.

Application tiled April 2, 1 906. Serial No. 309,283.

.and State of New Jersey, (with post-office iiddress52 Lawrence strect,) have invented certain new and useful Improvements in Vacuum-Tube Apparatus, of which the fol- `lowing is a speciiication.

The present invention relates to vacuum tube or vapor electric lamps, vacuum or va or rectifiers, X-ray tubes, vacuum osci of'raphs, wireless telegra li receivers and other device which geueraly may be classified under' he head of vacuum tubes and which are provided with suitable electric terminals whereby electric energy may be ap lied to the gaseous contents of the tube or any pur ose.\"4

li y prese nvention is an improvement upon my prior;inv-'entioii set forth in my prior ap ilica "onS.N. 275,003, filed Aug'. 21, 1905, w erein have described the application to a vacunitubc, of a valve which admits minute quantities of the gas into the tube in regulated amounts suilicient to keep the tension .of the gaswithin the tube at normal state, said valvewesponding automaticallv to changes inthe gaseous tension in The object of my present invention is to permit the use of a tank carrying the desired gas at high pressure so that the tube may be run for very great lengths of time without renewal 'of the source of supply.

-in `the operation of the apparzitusxilescribedin my prior application, it is desirable that the tension of the ga's in the valve chamber should be but little above the tension ofthe gas in the tube, the object being to prevent sudden iii-rush of a large quantity of gas when .the valve opens.

entrance o'f air when the supply of gas from l i. l

the tank fails and the ytension of the ge* in the valve chamber becomes so small that the feeding of the gas to the tube ceases.-

My invention consists further in the special combinations of devices hereinafter 60 more particularly described and then specified in the claims. i

In the accompanying drawings, Figure 1 is a side elevation of apparatus embodying my invention, the operative parts beingv shown assembled in a suitable casing. Fig. 2 is a view taken at right angles to that of Fig. 1 and shows the cbnnections of the tank and pressure reducing,r valve..

Referring to the drawings, A indicates tice casing and B a. tank holding a. compressed charge. of the desired gas, as for instance; nitrogen. t

C is a valve through which the air or gas is admitted to a pipe leading'r to the vacuum tube, a section of which is indicated at E. The valve C may, be of the character xicscribed in my prior anplication or of sa; other desired form. '.llie forni shown corniprises a conical plug of porous material like compressed carbon which is inserted in the mouth' of the tube D and stands in a batli ef tronisgn'et H. Said eleetroinagnct is coineet-ed to-seine electric circuit through wiuc' energy is furnished to the tube E and in surrlii manner `that when the tension or the gets `Jfalls in the tube, or iii-other words, when tbe 951 vacuum .becomes higher than the desired 1 'usted vacuum, the magnet will respond and y raisingfthe plunger or displacer G, will cause air orgas to be admitted to the pipe D and tube E to bring the vacuum back to nor-* mal, which action of `the magnet H is, the result of the' decrease of the. resistance @tiered to :lie passage of the energy from one eis-cftrcdeto the other through the gas when 'linie tension thereof falls.

Tank B is connected by a siiible pigewith a pressure reducing valve o any les sired character, as for instance, a die imagen or disk pressure reducing valve K,'t e li T pressure side of which is connected to tra@ 11o v pressure side the pi 'chamber l ilus ress me pisted to maintain m the ced pressure of the gais such, however to be slightly above the\ pressure or tension which itl is desired toA maintain iu the tube This, difference ef presurc is in order to prevent, unset,-

iling or sudden changes lof tension in E, but

i0 is' suflicientto cause aositive How of gas vfrom valve chambenlovhen tbe vulve is .'opened. In the tanff .l 'muy desired pressure or volume of gais iniyfbe compressed und `said gas may of any desired kind accord ing to the el'ecs which. it; is desired to produce inthe tube E.

One of the uses omy invent-ion is for sfznplying gas to the vacuum tubes used for lig ting, since, by its nienns, a light may be 2o maintained for indefinite periods bv the use r Y. r

or tanks B of eoniparntlvely small size which need be renewed o; ly. et long intervals.

Connected to tb' .low valve is :i vacuungage l. Said gege indicet-es the condition 1n the connections to the tube, but also may be adjusted so es to prevent the light in the tube E from becoming extinguished in cese the supply of gris from tlse tank B should fail. i'or tiiis purpose, 3e the mercury the pressure gage M is 'nitide of such amount. that on reduction of the pressure on the low pressure side of the reducing valve below the desired or normal pressure, the level of the .mercury in the side of the ressure exposed tc air pressure, ful into tire bend of the U or even be carried up on to the low pressure side to such extent. to allow bubbles of nir to iiud ingress through the rzzercuryrolunm und into the zo connection leading to the valve chamber. if, therefore, et any time the supply from the tank B should e out, nir will be supplied and fed to the ss-be to permit the sume to continue its operstion in s manner not, very erent from its operation `when supplied i mit: nitrogen compressed iu the tank B. It is to be undersr'wd, hmvcver, that this part. of my invention useful no metter what the h-:iructer of the gris supplied from tankB or the purpose of keeping the tube E in op- "\ers.tion as e. YC giving tube.

My invention s not. confined to any particular kind of reducing valve K nor to :my psriicular meets for automatically opereting the admis-N n *faire through which the supply of gas to the tube. E is admitted.

lfhile I have shown and described my invention as carri-1d out. in connection with u tank containing supply of the gas, it'being 6o especially usef1 nl that -connection, it is to be understood the; 1 claim, brondly, the npressure s ideof the.

' plicat-ion of the pressure reducing vulve in a.

position between any source oi air or gus under pressure, whether the saine be u tank or l iw-hamm, and the automatic valve which, by 6.

\its automatic regulating notion, controls the supply of gas to e. vacuuin tube in n manner to reserve e const-ant tension of the gas wit 'n said tube. i.

What I claim es my invention is:

1."\The combination of u `vacuum tu he Mnteining a gars in reretied condition, a tank cont-aining'a supply of gas of the vlesired kind under compression, a valve through which the gas is admitted to the tube aulonieticnlly in response to changes of gus tenl sion therein und n pressure reducing valve i between seid valve and the tank.

2. The combination of n vacuum tube lamp, a source of gus under pressure, :in autoinatic valve admitting gus tf the tubo from said source, and n pressure reducing valve between said valve and source..

3. The combination of a vftcuuni tube lamp, e gas. holder containing gn\uuder'85 pressure and u pressure reducing vulve between the lomo :ind gus holder.

4. The combination with n vacuum tube, of an automatic valve. governingr the flow of gas to said tube, and a pressure reducing valve between the automatic valve und the source of supply.

5. The combination with e vacuum tube and an automatic valve, of e pressure reducing valve, a tank containingr gas under pressure and e vacuum gauge open on one 'side to the air and connected ou the other to the low pressure side of the pressure reduc.- ing valve.

6. The combination of a vacuum tube'fful 100 automatic magnetic feed device through which gas may be admitted to the tube and e pressure reducer interposed between the feed device and the sourcoof gas. Y

7. The combination of :t vacuum tube lainp,`r.n automatic ximguetic feed device through which gus muy be :idxuittcd to the tube and a iressure reducing vulve connected to the lnigh pressure. side of the megnetic feed device.

'8. The combination of n vacuum tube lmnp, un automatic n uignetif.- feed ralvc sind a pressure reducingr vulve connected to the high pressure side of the vnlvc.

Signed at New York in the county of New 115 York :md State of New York this SOthdny of Mar-:h A. D. NUS.

DANIEL MrFAltln'tN MOORE.

l/Vitnesfes:

C. F. Trscuxi-m, Jr.,

LILLIAX BLOND. 

